Research in Method of Pulse Gas Drainage
Nowadays, the gas drainage system from coal body with the constant negative pressure to drainage.The time of gas drainage is the important measure to gas drainage effect.Through laboratory tests found that the simulation of negative pressure coal gas drainage change positive pressure sweep, gas permeability in coal body increase several orders of magnitude.The gas seepage in coal body analysis found that fractures with large scale in coal body to gas positive and negative pressure, though reflect, but not sensitive; The gas in inside coal microcosmic structure, is not stable, in coal mine, it can be examined to 20 MPa around the gas pressure in coal seam; Gas pre - drawing the key factor is the many small fissures, that control seepage communication between large scale cracks and micro structure, it sensitive to the pressure, if we can through the change of gas pressure direction and pressure size, it will be effective to control the gas seepage in coal body.The coal seam with low permeability, and has danger of coal and gas outburst, the variable pressure range will be increase further more, provide high pressure than coal body breakage, the purpose of gas drainage and reduce the danger of coal and gas outburst should achieve.
seepage drainage pulsation gas pressure
Zhao Yuqi Wu Linfeng Fu Qiang
Safety Engineering Department,North China Institute of Science and Technology
国际会议
the 4th International Symposium on Mine Safety (2012) 第四届国际矿山安全学术研讨会(2012)
阜新
英文
419-423
2012-08-04（万方平台首次上网日期，不代表论文的发表时间）